golang.org/x/text@v0.14.0/width/example_test.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package width_test
     6  
     7  import (
     8  	"fmt"
     9  
    10  	"golang.org/x/text/width"
    11  )
    12  
    13  func ExampleTransformer_fold() {
    14  	s := "abｦ￦￮￥Ａ"
    15  	f := width.Fold.String(s)
    16  	fmt.Printf("%U: %s\n", []rune(s), s)
    17  	fmt.Printf("%U: %s\n", []rune(f), f)
    18  
    19  	// Output:
    20  	// [U+0061 U+0062 U+FF66 U+FFE6 U+FFEE U+FFE5 U+FF21]: abｦ￦￮￥Ａ
    21  	// [U+0061 U+0062 U+30F2 U+20A9 U+25CB U+00A5 U+0041]: abヲ₩○¥A
    22  }
    23  
    24  func ExampleTransformer_widen() {
    25  	s := "ab¥ｦ₩￮"
    26  	w := width.Widen.String(s)
    27  	fmt.Printf("%U: %s\n", []rune(s), s)
    28  	fmt.Printf("%U: %s\n", []rune(w), w)
    29  
    30  	// Output:
    31  	// [U+0061 U+0062 U+00A5 U+FF66 U+20A9 U+FFEE]: ab¥ｦ₩￮
    32  	// [U+FF41 U+FF42 U+FFE5 U+30F2 U+FFE6 U+25CB]: ａｂ￥ヲ￦○
    33  }
    34  
    35  func ExampleTransformer_narrow() {
    36  	s := "abヲ￦○￥Ａ"
    37  	n := width.Narrow.String(s)
    38  	fmt.Printf("%U: %s\n", []rune(s), s)
    39  	fmt.Printf("%U: %s\n", []rune(n), n)
    40  
    41  	// Ambiguous characters with a halfwidth equivalent get mapped as well.
    42  	s = "←"
    43  	n = width.Narrow.String(s)
    44  	fmt.Printf("%U: %s\n", []rune(s), s)
    45  	fmt.Printf("%U: %s\n", []rune(n), n)
    46  
    47  	// Output:
    48  	// [U+0061 U+0062 U+30F2 U+FFE6 U+25CB U+FFE5 U+FF21]: abヲ￦○￥Ａ
    49  	// [U+0061 U+0062 U+FF66 U+20A9 U+FFEE U+00A5 U+0041]: abｦ₩￮¥A
    50  	// [U+2190]: ←
    51  	// [U+FFE9]: ￩
    52  }